Vehicle-mounted temperature controller

Abstract

A vehicle-mounted temperature controller includes a first heat circuit having a heat exchanger for a heat generating device and a first heat exchanger; a second heat circuit having a heat medium flow path of an engine and a second heat exchanger; and a refrigeration circuit having the first heat exchanger to make the refrigerant evaporate and the second heat exchanger to make the refrigerant condense. A circulation mode control device control a circulation mode so that the second heat medium raised in temperature by absorbing heat from the refrigerant at the second heat exchanger flows into the flow path, when the engine is stopped and heat is discharged from the heat generating device to the first heat medium in the heat exchanger for the heat generating device and heat is absorbed from the first heat medium to the refrigerant in the first heat exchanger.

The invention claimed is: 
     
       1. A vehicle-mounted temperature controller, comprising:
 a first heat circuit having a heat exchanger for a heat generating device, exchanging heat with the heat generating device and having a first heat exchanger, and configured so that a first heat medium is circulated through them, 
 a second heat circuit having a heat medium flow path of an internal combustion engine and having a second heat exchanger, and configured so that a second heat medium is circulated through them, and 
 a refrigeration circuit having the first heat exchanger making a refrigerant absorb heat from the first heat medium to make the refrigerant evaporate and the second heat exchanger making the refrigerant discharge heat to the second heat medium to make the refrigerant condense, and configured to realize a refrigeration cycle by the refrigerant being circulated through them, wherein 
 the second heat circuit further has a circulation mode control device controlling a mode of circulation of the second heat medium in the second heat circuit, and 
 the circulation mode control device performs stopping control for controlling the circulation mode so that the second heat medium raised in temperature by absorbing heat from the refrigerant at the second heat exchanger flows into the heat medium flow path of the internal combustion engine, when the internal combustion engine is stopped and heat is discharged from the heat generating device to the first heat medium in the heat exchanger for the heat generating device and heat is absorbed from the first heat medium to the refrigerant in the first heat exchanger, wherein 
 in the stopping control, the circulation mode control device controls the circulation mode so that even when the internal combustion engine is stopped and heat is discharged from the heat generating device to the first heat medium in the heat exchanger for the heat generating device and heat is absorbed from the first heat medium to the refrigerant in the first heat exchanger, if the temperature of the second heat medium in the heat medium flow path of the internal combustion engine is higher than a predetermined upper limit temperature, the second heat medium does not flow into the heat medium flow path of the internal combustion engine. 
 
     
     
       2. A vehicle-mounted temperature controller, comprising:
 a first heat circuit having a heat exchanger for a heat generating device, exchanging heat with the heat generating device and having a first heat exchanger, and configured so that a first heat medium is circulated through them, 
 a second heat circuit having a heat medium flow path of an internal combustion engine and having a second heat exchanger, and configured so that a second heat medium is circulated through them, and 
 a refrigeration circuit having the first heat exchanger making a refrigerant absorb heat from the first heat medium to make the refrigerant evaporate and the second heat exchanger making the refrigerant discharge heat to the second heat medium to make the refrigerant condense, and configured to realize a refrigeration cycle by the refrigerant being circulated through them, wherein 
 the second heat circuit further has a circulation mode control device controlling a mode of circulation of the second heat medium in the second heat circuit, and 
 the circulation mode control device performs stopping control for controlling the circulation mode so that the second heat medium raised in temperature by absorbing heat from the refrigerant at the second heat exchanger flows into the heat medium flow path of the internal combustion engine, when the internal combustion engine is stopped and heat is discharged from the heat generating device to the first heat medium in the heat exchanger for the heat generating device and heat is absorbed from the first heat medium to the refrigerant in the first heat exchanger, wherein 
 the second heat circuit further has a radiator exchanging heat between the atmosphere and the second heat medium, 
 the circulation mode control device is configured to control a ratio of the second heat medium flowing out from the second heat exchanger to the radiator and to the heat medium flow path of the internal combustion engine, and 
 in the stopping control, the circulation mode control device controls the ratio so that when the internal combustion engine is stopped and heat is discharged from the heat generating device to the first heat medium in the heat exchanger for the heat generating device and heat is absorbed from the first heat medium to the refrigerant in the first heat exchanger, if the temperature of the second heat medium in the heat medium flow path of the internal combustion engine is relatively high, compared to if the temperature of the second heat medium is relatively low, the ratio of the second heat medium flowing into the radiator is higher. 
 
     
     
       3. The vehicle-mounted temperature controller according to  claim 1 ,
 wherein the vehicle-mounted temperature controller is mounted in a vehicle having the internal combustion engine and a motor as drive sources, and 
 the stopping control is performed when the internal combustion engine is stopped and the vehicle is driven by the motor. 
 
     
     
       4. The vehicle-mounted temperature controller according to  claim 2 ,
 wherein the vehicle-mounted temperature controller is mounted in a vehicle having the internal combustion engine and a motor as drive sources, and 
 the stopping control is performed when the internal combustion engine is stopped and the vehicle is driven by the motor.